Make sure that for Bash output, _key is local

and that does not happen for POSIX output.
Fixes: #181

Author: matejak

bin/argbash

@@ -107,6 +107,7 @@ print_help()
 parse_commandline()
 {
 	_positionals_count=0
+	local _key
 	while test $# -gt 0
 	do
 		_key="$1"

bin/argbash-1to2

@@ -53,6 +53,7 @@ print_help()
 parse_commandline()
 {
 	_positionals_count=0
+	local _key
 	while test $# -gt 0
 	do
 		_key="$1"

bin/argbash-init

@@ -85,6 +85,7 @@ print_help()
 parse_commandline()
 {
 	_positionals_count=0
+	local _key
 	while test $# -gt 0
 	do
 		_key="$1"

src/function_generators.m4

@@ -168,6 +168,7 @@ m4_define([_MAKE_ARGV_PARSING_FUNCTION], [MAKE_FUNCTION(
 	[parse_commandline], [m4_do(
 		[_JOIN_INDENTED(1,
 			_IF_HAVE_POSITIONAL_ARGS([[_positionals_count=0],]),
+			m4_if(m4_expand([_OUTPUT_TYPE]), [bash-script], [[local _key]]),
 			[while test $[]# -gt 0],
 			[do],
 		)],

tests/regressiontests/Makefile

@@ -254,12 +254,15 @@ stability: $(TESTDIR)/basic.sh $(TESTDIR)/basic2.sh
 basic: $(TESTDIR)/basic.sh
 	$(generic_regression_posix)
 	$(generic_regression_gnu_only)
+	grep -q "local _key$$" $<
 	$< -h | grep -q 'P percent: %'
 	$< -h | grep -q 'O percent: %'
 	! $< -h | grep -qe '\[--\]'
 	test -z "$(SHELLCHECK)" || $(SHELLCHECK) "$(TESTDIR)/basic.sh"
 basic-dash: $(TESTDIR)/basic-dash.sh
 	$(generic_regression_posix)
+	! grep -q "local _key$$" $<
+	$< LOO -b | grep -q BOOL=off,
 	$< LOO -b | grep -q BOOL=off,
 	$< -h | grep -q 'P percent: %'
 	$< -h | grep -q 'O percent: %'

tests/regressiontests/make/tests/tests-base.m4

@@ -6,6 +6,7 @@ ADD_TEST_BASH([stability], [[
 ADD_TEST_BASH([basic], [[
 	$(generic_regression_posix)
 	$(generic_regression_gnu_only)
+	grep -q "local _key$$" $<
 	$< -h | grep -q 'P percent: %'
 	$< -h | grep -q 'O percent: %'
 	! $< -h | grep -qe '\[--\]'
@@ -14,6 +15,8 @@ ADD_TEST_BASH([basic], [[
 
 ADD_TEST_DASH([basic], [[
 	$(generic_regression_posix)
+	! grep -q "local _key$$" $<
+	$< LOO -b | grep -q BOOL=off,
 	$< LOO -b | grep -q BOOL=off,
 	$< -h | grep -q 'P percent: %'
 	$< -h | grep -q 'O percent: %'